For just $12, you can get 11 science fiction books right now, by authors including Alan Dean Foster, Barbara Hambly, Harlan Ellison, Greg Bear and Elizabeth Ann Scarborough. But you better move fast: the Humble Sci-Fi eBook Bundle won't last forever.

Chances are, you've done the Humble Bundle thing before, so you're familiar with the concept: You pay what you want for a collection of five books: The Healer's War by Elizabeth Ann Scarborough, The Reluctant Swordsman by Dave Duncan, Freehold by William Dietz, The Time of the Dark by Barbara Hambly and Wingman by Mack Maloney.

But then there are incentives, if you pay more than the average amount (currently $11.58) or more than $12. According to the press release:

Customers who pay more than the average price will receive those titles as well as unlock Spellsinger by Alan Dean Foster, I Have No Mouth and I Must Scream by Harlan Ellison, The Forge of God by Greg Bear and Song of Kali by Dan Simmons. If customers pay $12 or more, they'll receive all of the above, plus Encounter with Tiber by Buzz Aldrin and John Barnes, and Blackcollar by Timothy Zahn.

And more books are being added. Some of the money from this fund can go to charities. So you can choose to pay a lot more, and know that you're not just supporting great authors, but also the FirstAuthors charity and the SFWA Emergency Medical Fund. Definitely worth checking out if you need some new books in your to-read pile! [Humble Bundle]